#include <QApplication>
#include <QComboBox>
#include <stdio.h>

void ordenar_combo(QComboBox& combo) {
    size_t size = combo.count();
    printf("%zu\n", size);
    QString t1;
    QString t2;
    for (size_t i = 0; i < size / 2; ++i) {
        t1 = combo.itemText(i);
        t2 = combo.itemText(size - i - 1);
        combo.setItemText(i, t2);
        combo.setItemText(size - i - 1, t1);
    }
}

int main(int argc, char* argv[]) {
    QApplication app(argc, argv);
    QComboBox combo;
    combo.addItem("1");
    combo.addItem("2");
    ordenar_combo(combo);
    combo.show();
    return app.exec();
}